Mining Weekly reported that three workers were killed and more were missing after a training tunnel collapsed at the world’s second-largest copper mine, located in Indonesia, owned by Freeport-McMoRan Copper & Gold Inc.

As quoted in the Mining Weekly report:

Several officials at the mine, who were not authorised to speak to the media, said three people had been killed and at least 30 people were missing, but that was not confirmed by Freeport.